refactor: add a BC layer for 2.x #2069

Job	Run time
Code Coverage	1m 12s
Build Documentation	28s
P:8.1, S:6.3.*, D:mysql (dama)	36s
Static Analysis	27s
Sync meta files	0s
P:8.1, S:6.3.*, D:mongo	36s
P:8.1, S:6.4.*, D:mysql (dama)	46s
Test rector rules	16s
P:8.1, S:6.4.*, D:mongo	40s
P:8.2, S:6.3.*, D:mysql (dama)	33s
P:8.2, S:6.3.*, D:mongo	38s
P:8.2, S:6.4.*, D:mysql (dama)	34s
P:8.2, S:6.4.*, D:mongo	50s
P:8.2, S:7.0.*, D:mysql (dama)	36s
P:8.2, S:7.0.*, D:mongo	51s
P:8, S:5.4.*, D:mysql\|mongo (lowest) (dama)	1m 3s
P:8.2, S:*, D:none	17s
P:8.2, S:*, D:mysql\|mongo (dama)	1m 8s
P:8.2, S:*, D:pgsql\|mongo (dama)	1m 16s
P:8.2, S:*, D:pgsql	1m 47s
composer-validate / Validate composer.json	8s
Run php-cs-fixer	0s
	14m 42s

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